Help : gsn_contour_shade is not working for "ExplicitLevels" cnLevelSelectionMode

From: heaven_bird334 <heaven_bird334_at_nyahnyahspammersnyahnyah>
Date: Sat Aug 25 2012 - 19:59:38 MDT

Hi,
       I met a strange problem that the "gsn_contour_shade" seems not working for "ExplicitLevels" cnLevelSelectionMode. It seems can not add the shaded area for coutours. I have attached the script(t.nc), input data(t.nc) and ouput pic(t.png) behind this email. And the following is the detailing infos:
@> ncl -x t.ncl
 Copyright (C) 1995-2011 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 6.0.0
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
Loading file "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
+
Loading file "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
+
Loading file "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
+
Loading file "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl"
+
+ begin
+ f=addfile("t.nc","r")
+ sig=f->sig ; Three values in this var, -1,0,1
+ printVarSummary(sig)
+
+ ;wks = gsn_open_wks("x11","t")
+ wks = gsn_open_wks("png","t")
+ gsn_define_colormap(wks,"amwg_blueyellowred")
+ res = True
+ res@cnLineLabelBackgroundColor = "white" ; white bckgrnd around label
+ res@gsnAddCyclic = True
+ res@gsnPolar = "NH" ; select northern hemisphere
+ res@mpCenterLonF = 0
+
+ res@cnLineLabelsOn = True; False ; turn on line labels
+ res@cnFillOn = False
+ res@cnLinesOn = True; False
+ res@cnLevelSelectionMode = "ExplicitLevels" ; set manual contour levels
+ res@cnLevels = (/-0.99,0.,0.99/)
+ plot2 = gsn_csm_contour_map_polar(wks,sig(:,:),res)
+ opt = True
+ opt@cnInfoLabelOn = True;False
+ opt@gsnDraw = False
+ opt@gsnFrame = False
+ opt@gsnShadeHigh = 12 ; Use fill color #150 (yellow)
+ opt@gsnShadeLow = 7 ; You can use color indices or named colors.
+ plot2 = gsn_contour_shade(plot2, -0.99,0.99, opt) ; Shade contours > -4 yellow, and shade contour
+
+
+ end
Variable: sig
Type: float
Total Size: 21312 bytes
            5328 values
Number of Dimensions: 2
Dimensions and sizes: [lat | 37] x [lon | 144]
Coordinates:
            lat: [ 0..90]
            lon: [ 0..357.5]
Number Of Attributes: 4
  units :
  long_name : correlation
  _FillValue : -99.99
  missing_value : -99.99
 
        Any suggestion or commont is thankworthy!
 
Best Regards,
Li

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t.png
Received on Sat Aug 25 20:00:00 2012

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